Spiro[isoindoline-1,4'-piperidin]-3-one hydrochloride finds its application primarily in the pharmaceutical industry, where it is utilized as a key intermediate in the synthesis of various biologically active compounds. Its structure is particularly valuable in the development of central nervous system (CNS) drugs, including potential treatments for neurological disorders such as Alzheimer's disease and schizophrenia. The compound's spirocyclic framework contributes to its ability to interact with specific receptors in the brain, making it a crucial component in the design of novel therapeutic agents. Additionally, its hydrochloride form enhances solubility, which is beneficial for drug formulation and bioavailability. Researchers also explore its use in creating inhibitors for enzymes involved in disease pathways, further expanding its role in medicinal chemistry.